Embodiments disclose a method and apparatus for updating subject name information of a target information source. A specific embodiment of the method includes: acquiring at least one subject name from to-be-processed information; matching, for a subject name in the at least one subject name, the subject name with pre-acquired at least one initial information source subject name, and setting a weight for the subject name based on a matching result; and sorting the subject name in the at least one subject name and an initial information source subject name in the at least one initial information source subject name according to the weight to obtain updated at least one initial information source subject name.